Information for Concerns on Noise Heard Through the Audio System When Another Electrical component is Activated or Used. Saturn L Series 2002

For 1990-2009 cars

# Information for Concerns on Noise Heard Through the Audio System When Another Electrical component is Activated or Used

Subject: | Information For Concerns On Noise Heard Through The Audio System When Another Electrical Component Is Activated Or Used

Models: | 2000-2003 Saturn L-Series Vehicles

Attention: | General Manager, Fixed Operations Manager, Technician

### Purpose

The purpose of this bulletin is to provide information to address customer comments about noise coming from the audio system when other electrical components in the vehicle are activated or used. One example is that some customers might comment on a popping noise through the speakers when the brake pedal is depressed. The noise is due to electronic feedback coming from the brake/stop lamp switch. This concern can be addressed by referring to the "Symptom Table -- Noise and Reception Performance Complaints" subsection located in the Entertainment section of the appropriate 2000-2003 Saturn L-Series Body Electrical Diagnostics Service Manual. This section of the manual will provide diagnostic aids and service procedures for suppressing Audio System noises. The Symptom Table from the 2002-2003 Saturn L-Series Body Electrical Diagnostics Service Manual is reproduced below as an example.

Important: Refer to the Symptom Table in the Entertainment section of the appropriate 2000-2003 Saturn L-Series Body Electrical Diagnostics Service Manual for information for each specific model year.

#### SYMPTOM TABLE -- NOISE AND RECEPTION PERFORMANCE COMPLAINTS

Symptom | Procedure
--- | ---
Noise present when using power windows. | Refer to "Static Noise" below
Popping noise present when playing a cassette. | Refer to "Popping Noise" below
Poor reception. | Chart #13
Radio noise. | Chart #14
Radio noise entering through radio (sideway noise). | Chart #15
Radio noise entering through harness (backway noise) while engine not running. | Chart #16
Radio noise entering through harness (backway noise) while engine running only. | Chart #17
Radio noise entering through antenna system (frontway noise). | Chart #18
Engine electrical noise. | Chart #19
Secondary ignition noise (from spark plugs or wires). | Chart #20
Speaker harness related noise. | Chart #21
Switch pop or accessory noise | Chart #22